光调制器

A system and method for providing overvoltage protection during a pulse width modulation dimming of a liquid crystal display backlight inverter are provided.

提供了一种系统和方法，用于在液晶显示器背光反向器的脉宽调制调光期间提供过压保护。

In this dissertation, the optical implementations of integrated bypass-exchange switches and interconnection networks are investigated as the followings:(1) An electro-optic bypass-exchange switch integrated in a single substrate of birefringent crystal is proposed, which is polarization based, and consists of two beam splitters based on the phenomena of double refraction and inner double reflection and in-between an electro-optic modulator based on the electro-optic effect of crystal.

鉴于此，本论文从网络集成包装的角度出发，研究bypass-exchange开关和互连网络的光学实现，主要内容包括：(1)利用单轴晶体的双折射双反射原理和晶体的电光效应，设计了一种新颖的单块晶体集成的电光偏振控制型bypass-exchange光开关，将一个电光偏振控制型bypass-exchange光开关所必需的器件（两个光束分束器和一个电光调制器）集成在一块晶体上。

The semiconductor optical amplifier- cross gained modulation wavelength converter in the core node is used to transfer the payload from the old label to the new label to achieve the label erasion and insertion.

基于此光标记系统，研究Mach-Zehnder调制器的消光比、半导体光放大器的偏置电流、接收模块的输入功率、泵浦光功率、探测光功率对误码率的影响，以及转换波长与转换效率的关系。

The laser diode system is composed of three external cavity diode lasers and four injection diode lasers and a tapered amplifier. Four laser beams as 40K and 87Rb cooling and repump lights are obtained by using acoustic optic modulators to offset the frequencies from the three ECDL lasers. Four light beams with the different frequencies are injected into four slave lasers for injection locking, then Rb cooling light, K cooling light and K repump light are injected into a semiconductor tapered amplifier in a master oscillator-power configuration.

采用三台外腔光栅反馈半导体激光器、四台注入锁定激光器和一台半导体激光放大器组成激光系统，三台外腔光栅反馈半导体激光器通过声光调制器产生四束光，分别作为40K和87Rb原子的冷却光和再抽运光，四束不同频率成份的激光分别注入锁定四台从激光器，然后Rb cooling光、K cooling光和K repump光再同时注入半导体激光放大器进行放大。

The paper designs and develops the direct current drive circuit of SOA to realize the cross phase modulation for dual-loop optical buffer in the lab.

本文设计并研制出了SOA的直流驱动电路，用于实现本实验室中双环全光缓存器中信号光与控制光的交叉相位调制。

The fast axis of the quarter-wave plate is parallel to the dynamically induced birefringent axis of the photoelastic modulator.

被测1/4波片的快轴与光弹调制器的振动轴平行，且与起偏器和检偏器的透光轴分别成±45°夹角。

The key technologies of novel photoelectron elements to support RoF are optical generations and receivers technologies for millimeter wave subcarrier, including external modulator method, radio frequency up-conversion method, self-heterodyne method, generator of optical pulse self-modulation, and so on.

近年来，支撑RoF技术的新型光电子器件的关键技术有毫米波副载波光学产生技术和接收技术，其中包括外调制器方法、射频上转换法、光学外差法、毫米波调制光脉冲发生器等等。

Features are: small loss of luminous energy, simple structure, and small size.

这种激光接收及回波装置具有光能量损耗小、结构简单、体积小等特点；同时它能够提高信噪比，增大通信和识别距离；另外，这种激光接收及回波装置由于采用了布拉格声光调制器，从而具有更好的调制效果。

The test results demonstrate the circular polarization degree of output light of this optical circular polarization modulator is above 99.9%.

最后的光圆偏振度测试结果表明，本论文设计的调制器输出光的圆偏振度高达99.9%。

The test results demonstrate the circular polarization degree of output light of this optical circular polarization modulator is above 99.9%.

最后的光圆偏振度测试结果表明，本论文设计的调制器输出光的圆偏振度高达99.9%。来源：ABC6a论文网www.abclunwen.com

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。